Dynamo electric machine



April 16, 1935. E; KLAlBER 1,998,409

DYNAMO ELECTRI C MACHINE FiledJan. 26, 1954 PatentedApr. '16, 1935 1,998,409

UNITED STATES PATENT OFFICE DYNAMO ELECTRIC MACHINE Erich Klaiber, Stuttgart, Germany, assignor to Robert Bosch. Aktiengesellschaft, Stuttgart, Germany Application January 26, ,1934, Serial No. 708,460 In Germany February 10, 1933' 9 Claims. (Cl. 171-252) The present invention relates to a dynamo or separate sheets and secured on a shaft 11, which generator having a rotating conducting-piece for is mounted by means of ball-bearings o in the the: lines of force and stationarypermanent magside-plates. a nets whose similar poles are directed towards The windingslmay be suitably connected up.

3 I each other and connected by armature-cores They may, for instance, feed four quite separate 6 having inwardly-directed shanks between each circuits, or they may, for feeding a single current of which is a winding. The object of the invenconsumer, all be. connected in series or even in tion is to produce a dynamo which without a parallel. Instead of winding for lighting'pur-v regulator can feed several current consumers inposes, ignition windings may bearranged on the 10 dependently of the speed in such a way that the armature-cores. 10

. load on the machine caused by one current con- I declare that what I claim is: a sumer has practically no influence on the supply 1. A dynamo electric machine comprising a of another current consumer. According to the number of stationary permanentmagnets, pairs invention, this is attained by the generator being of like poles of which are directed towards each provided with at least four armature-cores and other, at least four armature cores each arranged 15 astar-shaped conducting-piece the arms of which intermediate a pair of like magnet poles, and simultaneously close the magnetic circuit of all having inwardly projecting shanks extending the armature-cores. therefrom, a winding arranged on each arma- An example of construction of the invention is ture core and a rotatable conductor member havshown in the drawing, in which: ing arms adapted simultaneously to close the 20 Figure 1 shows the dynamo or generator in magnetic circuit of all the armature cores. cross section. 2. A dynamo electric machine comprising a Figure 2 is a section on the line 2-2 of Fignumber of stationary permanent magnets, pairs ure 1. of like poles of which are directed towards each The generator shown inthe figures consists other, at least four armature cores each arranged 25 essentially of anumber of permanent magnets a, intermediate a pair of like magnet poles, and armature-cores b, which form the stationary part having inwardly projecting shanks extending of the machine, and a rotating piece 0 for contherefrom, a winding arranged on each armature ducting the lines of force that establishes the core andarotatable star-shaped conductor memmagnetic connection between the armature-cores. her having arms adapted simultaneously to close 30 Thearmature-cores are of U-shape. They are the magnetic circuit of all the armature cores. arranged at equal distances apart from each 3. A dynamo electric machine comprising a other and from the axis of rotation of the connumber of stationary permanent magnets, pairs ducting-piece. Their shanks d are directed inof like poles of'which are directed towards each 3 wards. I On each web e of the cores is a winding other, at least four armature cores each arranged for lighting purposes. The cores are composed intermediate 8. pair of like magnet poles and havof sheetmetal plates, held together by rivets 1. ing an inwardly projecting shank extending from The magnets a are mounted between the armature each end thereof, a winding arranged on each arcores in such a way that two poles of the same mature core between said shanks and a rotatable 40 sign bear on each core. The whole frame conconductor member having arms adapted simul- 40 sisting of the magnets and armature-cores is held taneously to close the magnetic circuit of the together by two side-plates g of non-magnetic armature cores. material. To these the cores are screwed by 4. A dynamo electric machine comprising a screws h. The plates themselves are secured tonumber of stationary permanent magnets, pairs gether and kept at the correct distance apart by of like poles of which are directed towards each screw-bolts i. Screws k are screwed into these other, at least four armature cores each arranged bolts, and by these screws the magnets are pressed intermediate a pair of like magnet poles and havfirmly against the armature-cores. ing an inwardly projecting shank extending from The conducting-piece c for the lines of force each end thereof, a winding arranged on each has four arms or prongs. m, which are so spaced armature core between said shanks and a rotat- 50 apart on the periphery of the conducting-piece able star-shaped'conductor member having arms that during the working of the machine they siadapted simultaneously to close the magnetic cirmultaneously connect one shank of each armacuit of all the armature cores through one of said ture withthe shank situated diametrically opposhanks.

site to it. The conducting-piece is composed of 5. A dynamo electric machine comprising a number of stationary permanent magnets, pairs of like poles of which are directed towards each other, at least four armature cores each arranged intermediate a pair of like magnet poles, and having inwardly projecting shanks extending therefrom, a winding arranged on each armature core and a rotatable conductor member having a number of arms extending therefrom equal to the number of armature cores and adapted simultaneously to close the magnetic circuit of all the armature cores.

6. A dynamo electric machine comprising a number of stationary permanent magnets arranged in circular disposition end to end with pairs of like poles directed towards each other, at least four armature cores each arranged intermediate a pair of like magnet poles and having inwardly projecting shanks extending therefrom, a winding arranged on each armature core and a conductor member rotatable about an axis at the centre of said circular magnet assembly and having arms adapted simultaneously to close the magnet circuit of all the armature cores.

7. A dynamo electric machine comprising a number of stationary permanent magnets ar ranged in circular disposition end to end with pairs of like poles directed towards each other, at least four armature cores each arranged intermediate a pair of like magnet poles and having inwardly projecting shanks extending therefrom, a pa r of end plates arranged one on each side of said magnet and armature assembly, a winding arranged on each armature core and a conductor member rotatable about an axis at the centre of said circular magnet assembly and having arms adapted simultaneously to close the magnet circuit of all the armature cores.

8. A dynamo electric machine comprising a number of stationary permanent magnets of arcuate form arranged in circular disposition end to end with pairs of like poles directed towards each other, at least four armature cores each arranged intermediate a pair of like magnet poles and having inwardly projecting shanks extending therefrom, a winding arranged on each armature core and a conductor member rotatable about an axis at the centre of said circular magnet as sembly and having arms adapted simultaneously to close the magnet circuit of all the armature cores,

9. A dynamo electric machine comprising a pair of end plates spaced apart, armature cores arranged between said end plates, and in circular disposition with regard to the centre of the end plates, a number of stationary permanent magnets arranged one between each pair 01' armature cores and having pairs of like poles directed towards each other, spacing members between said end plates, screw means engaging the ermanent magnets and said spacing means to press the magnets against said cores in a radially inward direction, a winding arranged on each armature core and a rotatable conductor member having arms adapted simultaneously to close the magnetic circuit of all the armature cores.

ERICH KLAIBER. 

